In the unitary air conditioning system, the assembled air conditioner is installed in or adjacent to the space to be conditioned. If the by-pass factor (X) of the cooling coil is known, then, from room If you have any questions about any topic you can ask in the comment section. Saif M. is a Mechanical Engineer by profession. relative cool and dry air is exhausted (mo = me). through the cooling coil and temperature and humidity ratio increase as air flows Energy is required for both cooling as well as reheat coils. return ducts and no energy addition due to fans, and applying energy balance across In the air conditioning system, the device or unit provides air conditioning is called an air conditioner. vi. Additionally, he has interested in Product Design, Animation, and Project design. It requires an appropriate size of window or hole in the wall to fit the conditioner. where close tolerance of dimensions is required.

Example: Window air conditioner and Split air conditioner. The outside air flows through a damper and mixes up with the re-circulated air (which is obtained from the conditioned space). The cooling coil may be evaporator of the refrigeration system or coil through which chilled water is passed. From the conditioned space the part of air is exhausted to atmosphere by exhaust fans or ventilators. 6. b. 3. The machine operates... LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. This leakage of... Slotter Machine - Types, Parts, Operations, Diagram, Specification. The filter cleans the air coming from the room before passes through the cooling coil. Many transport vehicles use air-conditioning systems such as cars, trains, aircraft, ships, etc. The remaining part of the used air or recirculated air is again conditioned as shown in the figure. The outside air flows through the damper and mixes up with recirculated air .which is obtained from air-conditioned space. The central air conditioning either direct or indirect type. that the air undergoes as it flows through the cooling coil (i.e. An air conditioner (AC) in a room or a car works by collecting hot air from a given space, processing it within itself with the help of a refrigerant and a bunch of coils and then releasing cool air into the same space where the hot air had originally been collected. This system used large capacity units. The condenser coils dissipate the heat as the liquid travels through them. The outside air is sucked and made to mix with recirculated air in order to make up for the loss of conditioned or used air through exhaust fans or ventilators from conditioned space. As shown on the psychrometric fraction of the re-circulated air. The window air conditioner mainly used for conditioning of air in the room. Since the sensible and latent cooling loads on the conditioned space Since either Mo or the ratio Mo : Mrc are specified, one can calculate the amount of recirculated added to take care of the ventilation requirements. Assuming no heat transfer due to the ducts and fans, This device continuously draws air from an indoor space which is required to cool, it cools in the refrigeration system and discharges back into the same indoor space. The hot air coming from room is flowing on the evaporator (cooling coil), the cooling coil absorbs heat from the air. The complete process of air conditioning includes the following processes. at required low temperature and humidity. This unit is installed in or near to space to be conditioned. from energy balance across it. Commercial Air-conditioning – It is similar to comfort air-conditioning except that the stay time of occupant is short. chart, when the by-pass factor is zero, the room ADP is equal to coil ADP, which in from supply state ‘s’ gives the condition of the air at the exit of the cooling coil. From the conditioned space the part of air is exhausted to atmosphere by exhaust fans or ventilators. In this system air is cooled and generally dehumidified. Summer air conditioning system c.Year-Round Air Conditioning System.

conditioned space it can counteract the sensible and latent heat transfers taking Where the gas is condensed into a hot liquid. Used in hospital operating theatres to provide comfortable conditions to patients. This process is most commonly used to achieve a more comfortable interior environment, typically for humans. Learn how your comment data is processed. The coil has a temperature much less than the required dry bulb temperature of the air in the conditioned space. process i-s) will be v. The capacity of the cooling coil is obtained.

heat transfer rates, Qs,c, Ql,c and Qt,c at the cooling coil are given by: Where ‘m’ refers to the mixing condition which is a result of mixing of the recirculated air with outdoor air. link to Hydraulic seals - Definition, Types, Diagram , Function, Failure, Application, link to Slotter Machine - Types, Parts, Operations, Diagram, Specification.

Commonly it is mounted in a window, hence it is known as a window air conditioner. 5, this system consists of one single process, which is the adiabatic evaporative cooling process (1–2).Such a system is suitable for hot and dry out door design conditions. Since the supply temperature is specified one can calculate the required supply air flow rate and supply conditions. It may also be defined as the science which deals with supply and maintaining desirable internal atmospheric condition irrespective of external condition. building (e.g. The flow of hot air (from the room) and cooled air (to room) is taking place by the evaporator blower. 3.Textile Industry: Relative humidity and temperature are the key factors of the textile industry. The cooled air passes through a perforated membrane and loses its moisture in the condensed form which is collected in a sump. Evaporator/cooling coil, condenser, compressor, expansion device Air circulation fan. The basic components of the air conditioning system are, 1. The main components of the central system are compressor with motor drive, condenser with cooling coil, throttling devices. The basic components of the air conditioning system are. In the summer air conditioning system, the cooling operates to cool the air to the desired valve.

He is also an author and editor at theengineerspost.com. Addition of moisture in the air (Humidification) or removal of moisture from the air (Dehumidification), Components of the air conditioning system.

The intersection of this All the rooms are required to be maintained at more or less similar conditions.

The window air conditioner unit consists of the following components as shown in fig, Refrigeration unit Evaporator/cooling coil, condenser, compressor, expansion device Air circulation fan. When you switch the air conditioner on, the thermostat control sends 120V of alternating current to the compressor and the fan motor. depends on the Coil Sensible Heat Factor (CSHF) given by: For actual cooling coils, the by-pass factor will be greater than zero, as a result the air temperature at the exit of the cooling coil will be higher than the coil ADP, as shown below. Thus the air is cooled and dehumidified to meet the requirement of comfort air conditioning in the room. The air conditioner designed such that when the outdoor air temperature is either above or below a certain selected value, it assumes the season as summer or winter respectively. one can draw the process line s-i, from the RSHF and state i. Currently, he is working in the sheet metal industry as a designer. And many more industries like Textile, Printing, Photographic and much more. from the three equations. © Copyright 2020 TheEngineersPost.com - All Rights Reserved, Air-Conditioning System: It's Working Principle and Types of Air Conditioning system, Equipment Used in an Air Conditioning System, 3. The flow of hot air (from the room) and cooled air (to room) is taking place by the evaporator blower. The outside air is sucked and made to mix with recirculated air to make for the loss of conditioned air through exhaust fan from the conditioned space. estimated.

Condition of air after mixing (point ‘m’) is obtained from known values of ms and mo. This continuous cyclic process of drawing, cooling, and recirculation of the cooled air maintains indoor space cool at the required lower temperature which is required for comfort cooling. slope, one can draw the process line s-i through i. the sensible and latent heat transfer rates at the cooling coil are exactly equal to the Purification of air 5. Air conditioners work on the principle that “liquids absorb heat when they become a vapor (evaporate). As the refrigerant liquid enters these coils it expands into a gas which makes the coils cold. First part: Includes the evaporator, filter, evaporator fan, and grille (cooling coil). 2.



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